AD7856ARS datasheet(6/32 Pages) AD

Nome de Peças	AD7856ARS

Descrição Electrónicos	5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC

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AD7856

–6–

REV. A

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD7856 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS

1

(TA = +25°C unless otherwise noted)

AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V

Analog Input Voltage to AGND . . . . –0.3 V to AVDD + 0.3 V

Digital Input Voltage to DGND . . . . –0.3 V to DVDD + 0.3 V

Digital Output Voltage to DGND . . . –0.3 V to DVDD + 0.3 V

REFIN/REFOUT to AGND . . . . . . . . . –0.3 V to AVDD + 0.3 V

Input Current to Any Pin Except Supplies2

. . . . . . .

±10 mA

Operating Temperature Range Commercial

A Version . . . . . . . . . . . . . . . . . . . . . . . . . –40

°C to +105°C

K Version . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

°C to +105°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150

°C

Plastic DIP Package, Power Dissipation . . . . . . . . . . 450 mW

θ

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . 105

°C/W

θ

JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . 34.7

°C/W

Lead Temperature, (Soldering, 10 secs) . . . . . . . . . +260

°C

SOIC, SSOP Package, Power Dissipation . . . . . . . . . 450 mW

θ

JA Thermal Impedance

. 75

°C/W (SOIC) 115°C/W (SSOP)

θ

JC Thermal Impedance . . 25°C/W (SOIC) 35°C/W (SSOP)

Lead Temperature, Soldering

Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . . . . . +215

°C

Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220

°C

ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >1 kV

NOTES

1Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational sections

of this specification is not implied. Exposure to absolute maximum rating condi-

tions for extended periods may affect device reliability.

2Transient currents of up to 100 mA will not cause SCR latch-up.

PIN CONFIGURATIONS

(DIP, SOIC AND SSOP)

13

16

15

14

24

23

22

21

20

19

18

17

TOP VIEW

(Not to Scale)

12

11

10

9

8

1

2

3

4

7

6

5

AD7856

CONVST

DIN

CLKIN

SCLK

SYNC

BUSY

SLEEP

REFIN/REFOUT

DVDD

DGND

DOUT

AVDD

AGND

CREF1

CREF2

AIN1

AIN2

AIN7

AIN8

CAL

AIN3

AIN4

AIN6

AIN5

ORDERING GUIDE

Linearity

Error

Package

Model

(LSB)

1

Options

2

AD7856AN

±2 typ

N-24

AD7856AR

±2 typ

R-24

AD7856KR

±2

R-24

AD7856ARS

±2 typ

RS-24

EVAL-AD7856CB

3

EVAL-CONTROL BOARD

4

NOTES

1Linearity error here refers to integral linearity error.

2N = Plastic DIP; R = SOIC; RS = SSOP.

3This can be used as a stand-alone evaluation board or in conjunction with the

EVAL-CONTROL BOARD for evaluation/demonstration purposes.

4This board is a complete unit allowing a PC to control and communicate with

all Analog Devices evaluation boards ending in the CB designators.

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